lms

Implement SST scheme #314

Job	Run time
clippy	22s
check-for-todos	3s
msrv	3m 52s
rustfmt	9s
set-msrv	3s
bench	43s
test (1.63)	3m 56s
cross (1.63, aarch64-unknown-linux-gnu, default)	8m 31s
build (1.63, thumbv7em-none-eabi)	1m 57s
test (stable)	2m 12s
cross (stable, aarch64-unknown-linux-gnu, default)	6m 27s
build (1.63, wasm32-unknown-unknown)	1m 55s
demos (stable, default)	28s
build (stable, thumbv7em-none-eabi)	15s
build (stable, wasm32-unknown-unknown)	15s
	31m 8s

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